C7 engine
Thread Starter
4th Gear
Joined: Aug 2021
Posts: 4
Likes: 1
From: Hannibal Mo.
C7 engine
New to the forum,
I’m looking for a rebuilt engine for my 2014. This will be engine number 4. First and second engine, dropped valves, third engine locked up.
Any recommendations would be appreciated.
I’m looking for a rebuilt engine for my 2014. This will be engine number 4. First and second engine, dropped valves, third engine locked up.
Any recommendations would be appreciated.
Le Mans Master
Joined: Jun 2002
Posts: 6,433
Likes: 3,624
From: Commerce Texas
At the rate you're going could have bought a replacement from Chevy for a lot less money than you're spending. I'd take it to Chevy dealer and be done with it..... seven Vettes, 31 years 979,000+ mies....
Thread Starter
4th Gear
Joined: Aug 2021
Posts: 4
Likes: 1
From: Hannibal Mo.
Yes, three engines. First at about 85000 miles dropped 2 valves. GM covered that one. Second engine went to 106000 miles. Dropped 4 valves. Out of warranty. Third engine has locked up at 121000 miles.
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It is HIGHLY unusual for someone to have to replace three engines - it is not like these things go around doing a complete failure all the time. Something just does not sound right.
However, if you are not doing something that leads to the engine failures, I would say it is time to find another car. That one is jinxed.
However, if you are not doing something that leads to the engine failures, I would say it is time to find another car. That one is jinxed.
Racer
Joined: Apr 2021
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My suggestion to the OP would be to get a stock LT1 with low miles.
Race Director
Joined: Apr 2017
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From: Virginia
Something's just not right here. Cut your losses and get another car...........................
Team Owner
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Melting Slicks
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From: MOUNTAIN HOME Arkansas
Last edited by madrob2020; Aug 29, 2021 at 07:41 AM.
Melting Slicks
Joined: Jul 2005
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Valve Spring Failure
Valve Spring Retainer / Lock failure
The Valve itself Failing (breaking).
I've seen each of these, and I've never seen an engine where multiple valves are "dropped" at the same time. So, my question is what RPM were you at when these multiple valve drops happened ???
As for what to do now - I don't believe that LS6 Crate engines are available any more. I know the LS6 Block is no longer available. (And honestly - the LS6's had issues with valve spring failures - so even with a brand new LS6 motor - I would change the valve springs before installing it.) If I were in your position, I would go to a reputable race engine builder, and have him look at your current engine (the one that locked up), and see if he thinks it's rebuildable / salvageable. If it is - have it rebuilt for "endurance" application (not high power or competition use). I would highly recommend going with wiih quality double valve springs, and then have a tuner reprogram the PCM to limit red line to around 5,500. (And if you enjoy downshifting to slow the car - I's suggest that you Don't Do That).